Catalytic, Enantioselective β-Protonation through a Cooperative Activation Strategy
作者:Michael H. Wang、David Barsoum、C. Benjamin Schwamb、Daniel T. Cohen、Brian C. Goess、Matthias Riedrich、Audrey Chan、Brooks E. Maki、Rama K. Mishra、Karl A. Scheidt
DOI:10.1021/acs.joc.7b00334
日期:2017.5.5
only feasible, but also adaptable to a kinetic resolution of secondaryalcohols through NHC-catalyzed acylation. In-depth analysis of this process determined that careful catalyst and solvent pairing is critical for optimal yield and selectivity; proper choice of nonpolar solvent provided improved yield through suppression of an oxidative side reaction, while employment of a cooperative catalytic approach
An effective <i>cis</i>-β-octahedral Mn(<scp>iii</scp>) SALPN catalyst for the Mukaiyama–Isayama hydration of α,β-unsaturated esters
作者:Paul S. Donnelly、Andrea J. North、Natalia Caren Radjah、Michael Ricca、Angus Robertson、Jonathan M. White、Mark A. Rizzacasa
DOI:10.1039/c9cc03921j
日期:——
cis-β-MnIIISALPN catalysts were synthesised and tested in the Mukaiyama–Isayama hydration of α,β-unsaturated esters. The MnIIIEtOSALPN(acac) complex 7 is the most active and catalyses hydration with little or no detectable undesired alkene reduction. This catalyst is superior for alkenehydration compared to the originally reported Mn(dpm)3 catalyst.
两个顺式-β-Mn系III SALPN催化剂合成和在向山测试- α,β -不饱和酯的谏山水合。Mn III EtOSALPN(acac)络合物7是最活跃的催化剂,可催化水合作用,很少或没有可检测到的不希望的烯烃还原。与最初报道的Mn(dpm)3催化剂相比,该催化剂在烯烃水合方面表现优异。